Internal seas are bodies of water that are partially or completely surrounded by land. They are often connected to larger oceans or seas through narrow straits or channels. Examples of internal seas include the Mediterranean Sea and the Caspian Sea. These seas can vary in size and depth and often have unique ecosystems. These bodies of water can play significant roles in regional climates, trade, and transportation. They may also support diverse marine life and provide resources such as fish and salt. Internal seas can be important for local economies and cultural practices, influencing the livelihoods of communities nearby.